lc897127k Sanyo Semiconductor Corporation, lc897127k Datasheet - Page 7

• Manufacturer Part Number: lc897127k
• Description: Scsi Cd-rom Decoder With On-chip Dvd Interface
• Manufacturer: Sanyo Semiconductor Corporation

Continued from preceding page.
• Unused ("NC") pins must be left open.
• Pins whose name is under a bar operate with inverted (negative) logic.
• V
• If DRAM is used, applications must adopt measures to prevent undershoot and other DRAM problems. Such measures include inserting resistors in the
• Since this device includes buffers that sink a current of 48 mA, applications must take adequate noise prevention measures.
RAS and CAS lines and inserting capacitors between V
number 25 of Transistor Technology for details on these measures.
SS0
Pin No.
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
is the logic system ground and V
UWE(RA9)
DVDSEL
RAS0
CAS0
CAS1
V
V
LWE
V
V
IO15
IO14
IO13
IO12
IO11
IO10
V
RA0
RA1
RA2
RA3
RA4
RA5
RA6
RA7
RA8
V
V
V
IO9
IO8
IO7
IO6
IO5
IO4
IO3
Pin
OE
SS1
SS0
SS0
SS0
SS0
DD
DD
DD
SS1
Type
P
P
P
O
P
O
O
O
O
O
P
O
O
O
O
O
O
O
P
P
O
O
B
B
B
B
B
B
B
B
P
B
B
B
B
B
P
is the SCSI interface driver ground.
Buffer RAM RAS signal output 0
V
Buffer RAM CAS signal output 0 (Normally fixed at 0 (low).)
Buffer RAM CAS signal output 1
Buffer RAM output enable
Buffer RAM upper write enable (RA9 when 8M or more DRAM is used.)
Buffer RAM lower write enable
Buffer RAM address signal outputs
Buffer RAM address signal outputs
Buffer RAM data I/O.
These pins have built-in pull-up resistors.
Buffer RAM data I/O.
These pins have built-in pull-up resistors.
SS0
SS
selects the DVD interface and V
pins. See the article on Designing with the Latest Microcontrollers and Memory in special issue
LC897127K
DD
selects the I/O port function.
Function
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